Valve.



L1A. KEISTER.

VALVE.

APPLICATION FILED AuG.25, |917.

Patented Dec. 31, 1918.

LQSQATQ.,

JOHN A. KEISTEB, OF ST. LOUIS, MISSOURI.

- VALVE.

Application led August 25. 1917. Serial No. 188.122.

To all whom t may concern: Y

Be it known that I, JOHN A. KEISTER, a citizen of the United States, residing at the city of St. Louis, in the State of Mlssouri, have invented certain new and useful Improvements in Valves, of which the following is a specification.

This invention relates to valves and particularly valvesr for tires, and it contemplates the provision of an improved and cheapened structure of this nature so constructed that it may readily be applied to or removed from valve-receiving tubes of standard construction and when in place will permit the introduction or release of air therethrough in a rapid way.

In the accompanying drawings forming part of this specification and in .which like numbers of reference denote like parts Wherever they occur,

Figure 1 is a longitudinal sectional view of this improved valve in place in the usual valve-receiving tube of an automobile tire and with protecting cap for the valve in proper position; l

Fig. 2 is ya side elevation of the valve casing and cap and part of the Valve-tube;

Fig. 3 is 'a vertical elevation on an enlarged scale of the valve casing and part of the valve-tube and nut;

Fig. 4 is a plan view on the line 4 4 in Fig. 3;

Fig. 5 is a perspective view showing the interior of the valve casing, but with the valve-tube absent;

Fig. 6 is a detail of the check-nut; and

Fig. 7 is a detail showing the enlarged air-inlet.

From the tire (not shown in the drawings, but of any ordinary or desired construction) .or any chamber protrudes the usual valvereceiving tube 1, .which is exteriorly threaded at 2 for reception of the interiorly screwthreaded body 3 of this invention.

The end of the body 3 away from the tube 1 is reduced in diameter and exteriorly screw-threaded at 4 to receive the interiorly threaded cap 5.y

The body 3 is hollow, for the passage of air or other fluid, for the introduction of which into the interior of the tire or other container the cap 5 must first be removed. y

Within the passage through the body 3 is located the valve-stem 6 bearing the valve collar 7, between which and the shoulder 8 is located, held, and borne the resilient collar Specication of Letters Patent.

Patented Dec. 31, 1918.

9 preferably impinges at an angular corner thereof Iabout midway between the edges of the valve-seat l0, and the said vaive-seat is preferably at an angle of about sixty degrees to the horizontal. By arrangement at the said angle and by the said arrangement nvhereby the angular end `of the gasket 9 bears at the point statedon the said valveseat, a beneficial result is obtained by reason of the gasket 9 being upset as shown in Fig. 1 at the point of engagement with valve-seat 10, thus forming the tightest and most complete engagement with the valveseat 10. The said gasket 9 is firmly held in place by the valve collar 7 of approximately the same diameter, and at its other end is prevented from any longitudinal movement by the shoulder 8, preferably of less diameter than the gasket 9.

The valve-seat 10 is formed on the inside of the inner end of a hollow cylinder 11 located within the body or casing 3, which casing is reduced at its forward-end and formed with the shoulder 12, against which engages the collar 13 connected to or formed integral with the cylinder 11. That portion of the valve seat member or cylinder .which extends above the shoulder 12 is slightly smaller in diameter than the inner diameter of the surrounding body 3 to form an annu-` lar space into which the dirt, and other foreign matter which usually accompanies the operationof inlating a tire, may drop. This provision maintains a clear passage for the air between the upstanding lugs 22, hereinafter referred' to, and should the annular space, after long usage, fill, it mayY readily be cleaned by removing the body 3.

The cylinder 11 is prevented from movement outwardly by engagement by collar 13 with shoulder 12 and is inhibited from movement in an inward direction by contact with gasket 14, which is located between the co1- lar 13 and the wall l5 of the mouth of tube 1.

The valve-stem 6 extends through the hollow cylinder 11 to the mouth thereof and is threaded at 16 to receive the internallythreaded polygonal nut 17, which is adapted to move back and forth in the chamber 18 in the forward end lof casing 3. The inner side of the nut 17 impinges against the spring 20,

the other end of the said spring 20 abutting side of the nut 17 and because of its considerable area presses the same and the valvestem 6 bearing the same inwardly far enough to open the valve wide enough at valve-seat 10 to afford the readiest access of air to the interior of the tube or chamber. The striking ofthe nut 17 'on the4 lug or lugs 22 acts as a check to prevent undue compression of spring 20, tending to weaken the said spring. The large bore through cylinder 11 and the large air-passage 23 opening out into the large air-chamber 24 in the mouth of tube 1 affords ready and quick ingress and egress for the air or 'other fluid to be controlled by the valve, while air readily passes around nut 17 in air-chamber 18.

` Wear of gasket 9 or weakening of spring 20 can be compensated for by adjustment of nut 17 on valve-stem 6. Gasket 25. insures a tight joint between the outer extremity of 20 in other constructions by undue pressure casing 3 and cap 5.

Inpractice it has been found that this construction, withthe permitted wide opening at valve-seat 10 by the thrusting away therefrom of the gasket 9, allows much more.

rapid vinflation or 'deflation of a tire than with valves heretofore commonly in use.

- Motorists frequently find it necessary to deiiate tires, and in so doing must either tediously hold pressure upon a valve to keep it open until all the airhas escaped or with difliculty remove the center of the valve. In the use of the present invention, however, this can be accomplished in the quickest and easiest manrer possible by unscrewling the body 3 from the tube 1, which allows all the air rapidly to exhaust through tube 1. The small valve parts are not disturbed when body 3 is thus removed, because they are taken of with it even while cap 5 remains in placel Y 4 This shows, also, the facility with, which these valves as a whole may be applied to any ordinary valve receiving tube not having a-valve in it, as such parts are made of standard sizes, and these valves are applied byfmerely screwing body 3 upon tube 1.

The `wearing out of a spring like spring (which/undue pressure is prevented by the check construction provided by the construction herein shown and described) renders a valve ineiicient, as it allows bubbling of air through the valve and makes it unable to hold air under light pressure, as when tires have been partially inflated for shipment.

.The outermost end of valve-stem 6 (i. e.,

the threaded part 16) projects slightly beyoud the polygonal nut 17 and is adapted to open the valve in the usual `air supply pipes at lilling stations. The end 16 may,

as shown in the drawings (Fig. 1), enter a central hole 26 in gasket 25.

It will be observed that the function of spring 20'is chiey to keep the valve closed while there'is no air within the tire orwhile the pressure therein is so slight as not topingement in the present invention 0f nut 17 on lug or lugs 22 prevents undue compression of spring 20, and the pressure thereon can be regulated and adjusted by means of rotation of nut 17 on threads 16.`

It will furthermore be perceived that, unlike the valve in most common use at the present time and for many years pasty for the use herein contemplated in connection with tires (in which the air pressure constantly tends to weaken' the spring, and in which the spring is a necessity to keep the valve closed), this valve seats tighter the greater the air pressure.

The valve ofhis invention provides a i triple -seal to prevent the exit Of'air, namely,

vatvalve-seat 10 and at gasket 14: and at gasket 25.

lThe reduced sleeve 27 onl the inner side of nut 17 is encircled by the spring 20".b

The projection of the lugs 22 leaves a pair of large passages 28 for the passage o f air.

The nut 17 being square has about double the area of the nut that can be used in the construction depicted in this 'inventors application for patent filed May 12, 1917, Se-

' rial No. 168,103, which produces a quickeracting valve. This quickness of action is also enhanced by the enlarged area of the air inlet to the interior of the hollow cylinder 3 as compared to the air inlet in the construction` of the said application and other earlier valves. A further'advantage of the valve herein shown and described over that of the. above-mentioned application is that in the nipples on the air-hose at some air-filling stations projections engage the extremity of the cylinder like vthe cylinder 3 of this .invention before the end of the valve-stem has been. depressed to the bottom of the slots, whereas in the construction herein shown and' described, the cylinder 3Y is relatively shorter (its extremity about matching the bottom of the slots in the earlier construction), and any projection upon the air-nipple engages and pressesA upon nut 17, thereby positively depressing the same to the point of contact with lugs 22. If there4 be no such projection upon the air-nipple, nut 17 will be thus depressed by the pressure of the compressed air` enteringIin the usual manner.

aving thus described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts, as it is evident that many minor changes may be made without departing froml the spirit of this invention.

I claim:

In a valve, a tubular body internally screw-threaded at one end for engagement with the stem of a tire and provided with an internal shoulder opposing the upper end of said stem, said body extending outwardly v in tubular form beyond the shoulder, a valve seat member provided with an external shoulder between its ends to be clamped between said first shoulder and the opposing end of the tire stem, the inner end of said valve seat member providing a valve seat and the outer end being of smaller diameter than the inner diameter of the surrounding portion of the body whereby to provide an annular space, said outer end of the valve seat member also having spaced outwardly extending lugs, a valve member engaging the seat of the valve seat member and pro.l vided with a stem eX` ,nding through the latter, a nut threaded on the outer end of the valve stem and engageable with the lugs for limiting the unseating movement of the valve member, and a spring encircling the valve stem and bearing outwardly on the nut to normally hold the valve member seated.

In testimony whereof I hereunto alix my signature. v

JOHN A. KEISTER.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents@ Washington, E. 

